Filter.



No. 769,143; PATENTED SEPT. a, 1904. E. BOELLINGHAUS.

FILTER.

APPLIOATION FILED DBO. 17, 1903.

1 N0 MODEL. 2 SHEETS-SHEET 1.

. Z 2620mm: (a vbvmyto/a VPATBNTBD SET. 6', 1904.

E. BOELLINGHAUS.

FILTER. APPLICATION FILED DEC. 17, 1903.

2 SHEETS-SHEET '2.

N0 MODEL.

1 16, Fla-5.

; UNITED [STATES- Patented September 6, 1904.

PATE T I OFF CE.

EMIL BOELLINGHAUS, OF HAMBURG-BORGFELDE, GERMANY.

FILTER.

SPECIFICATION forming part of Letters Patent No. 769,143, datedSeptember 6, 1904. Application filed December 17, 1903. Serial No.185,487- (No model.)

To all whom it may concern.-

Be it known that I, EMIL BOELLINGHAUS, a

citizen of Germany, residing at Hamburg- Borgfelde, Germany, haveinvented new and useful Improvements in Filters, of which the followingis a specification. I

This invention relates to a filter in which a number of separatefiltering-chambers communicate with a common liquid-supply pipe,

filtrate-discharge pipe, and rinsing-pipe. In

this way an effective filter for a large quantity [ofliquid andoccupyinga relatively small room is obtained.

'on line Gr H, Fig. 1.

The letter (0 represents a vertical inlet-pipe, into thetop a of whichthe liquid to be filtered enters. The lower section of pipe 0 contains aconcentric waste-pipe Z, which is open at the bottom and closed at thetop. Between the inner pipe Z and the outer pipe (0 there are arrangedfour upright partitions (0 which divide the space between the two pipesinto four ducts or compartments a (Z 72 7b, which are closed at thebottom.- The upper ends of diametrically opposite inlet-ducts 0? (Zcommunicate with the liquid-inlet a, while the upper ends of the twoother diametrically opposite outlet-ducts h communicate with afiltrate-discharge pipe h.

The pipe a is surrounded bya series of superposed filtering-chambers M,the drawings showing four such chambers; but any suitable number may beemployed. Between each filtering-chamber M and pipe at there is arrangedan upper annular compartment 0, divided by the upper compartment 0'.

Slightly above plate at each filterwhich communicates with compartment 0through ports 1). v

Pipe (0 well as sleeves b are provided with a number of perforations orports, which are so arranged that: three different operations may beperformed within the filter after sleeves b have been intermittentlyrotated.

In the initial position the liquid is filtered, in the second positionthe filtering material is washed, while inthe third position thefiltering material is again rendered fit for filtration.

As the ports are arranged in the same manner for all filtering-chambers,the description of the ports for but one chamber will suffice.

For filtering theliquid I provide each compartment (Z with an upper portf, that regis ters in the initial position. of sleeve bwith an apertureof said sleeve,.which opens into The lower compartment ccommunicates byports a of sleeve 6, that register with lower apertures a of pipe at,with the compartments 7b. In this position the liquid to be filteredwill flow as follows: It enters compartments (Z through inlet (0, passesthrough ports f 6 into upper compartment 0'. Thence the liquid is evenlydistributed upon the filtering material m by overflowing the rim 0 ofcompartment 0. After percolating through the filtering material thefiltrate enters through. perforated bottom on the chamber m and isdischarged through compartment 0, ports a a and compartments it into thefiltrate-outlet it For washing the filtering material a second series ofports is formed in pipe 0 and sleeve 6, which ports will register witheach other after the sleeve 6 has been rotated through sixty degrees. Inthis position of sleeve 6 the ports 6 and e are closed, while ports e'of compartments it will register with the ports a of sleeve 6. At thesame time ports Z2 will register with channels m, leading from pipe ainto pipe Z. In this position the operation is as follows:

Part of the filtrate previously obtained is used for washing thefiltering material, for which purpose it-is forced by any suitable means(not shown) from compartments It, through ports 2' c, compartment 0,into chambers m.

Thence it will pass through the filtering material in a directionopposite to that of the liquid previously filtered and is dischargedthrough ports Z it into waste-pipe Z. During the washing operation thefiltering material may be stirred by a rake g, operated by crank-handleq and illustrated in the second compartment of Fig. 1. After thefiltering material has been thus suflieiently washed the liquid fromcompartment cZ may be introduced into the filter, so as to compact thefiltering material again and render it suitable for the filteringoperation. For this purpose the sleeve 6 is again rotated through sixtydegrees, in which position the ports 2' 7c are closed, while the ports fof compartments (Z will register with the ports of sleeve 6, and ports 0will register with channels m, leading from pipe at to pipe Z. Theliquid will thus flow from compartments cZ, through ports f Z cylinder0. into filter-chamber M. Thence it y will pass through the filteringmaterial m perforated bottom m, chamber m compartment 0, ports 0 m intodischarge-pipe Z. Af-

hat I claim is- 1. In a filter, the combination of a pipe having inletand outlet duets, with a surrounding rotatable sleeve provided withseveral ports, a cylinder surrounding the sleeve and having a partitionto form an upper and a lower conipartment, a filtering-chambersurrounding the cylinder, filtering material within the chamber, portsfor connecting the inlet and. outlet duets with the upper and lowercompartments, and means to rotate the sleeve to change the direction offlow, substantially as specified.

2. In a filter, the combination of a pipe having inlet and outlet duets,with a surrounding rotatable sleeve provided with several ports, acylinder surrounding the sleeve and having a partition to form an upperand a lower compartment, a filtering-chamber surrounding the cylinder,filtering material within the chamber, ports for connecting the inletand outlet duets with the upper and lower eom 'iartments, a waste-pipe,ports for connecting the wastepipe with the upper and lowercompartments, and means to rotate the sleeve to change the direction offlow, substantially as specified.

Signed by me at Stuttgart this 19th day of November, 1903.

' EMIL BOELLI NG H A US.

\Vitnesses:

.ERNsT ENTERMOD, T. LADMIRANCE.

